Understanding the human body is a team effort. That's where the Yachtel group comes in.

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years. Yacold also

partners with nature portfolio to advance gut microbiome science through the global grants for

gut health, an investigator-led research program. To learn more about Yachtold, visit yawcult.co.j.p.

That's y-A-K-U-L-T dot-C-O-J-P.

When it comes to a guide for your gut, count on YacL.

This is Scientific American's 60-second science.

I'm Suzanne Bard. We recognize our friends' faces, and we're not alone.

Many social animals can identify individuals of their own species by their facial features.

That's important because they need to be able to adjust their behavior depending on who they encounter. And research

has shown that some species of monkeys, birds, and domesticated animals can even distinguish

among different faces by looking at photographs alone. Scientists have also wondered whether

domesticated animals that have coexisted with people for thousands of years can recognize different

human faces. For example, we've shared more than 5,000 years of our history with horses. Plus, they can

live up to 30 years and may need to retain a great deal of information about us throughout their lifetimes.

Ethologist Leia Lonsad of the French National Research Institute for Agriculture, Food, and Environment

did an experiment to find out how well horses can recognize individual people in photographs.

She and her team first taught the horses how to choose between

two side-by-side images by touching their noses to a computer screen. The horses were then shown

photos of their current keeper alongside faces of unfamiliar humans. They had never seen photos of any

of the people before. The horses correctly

identified their current keeper and ignored the stranger's face about 75% of the time, significantly

...